JP2017180244A - Saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fuel or moisture condensed in the inside of a resonator from entering a throttle device when a vehicle is not used after an engine stop, in a saddle-riding type vehicle with an intake apparatus, the intake apparatus including an air cleaner, a connecting tube with an upstream end connected to the air cleaner, the throttle device having a throttle valve and connected to the downstream end of the connecting tube, and the resonator, and being disposed at a position covered by a fuel tank from above.SOLUTION: A connecting tube 43 is formed with a bend 70 that is swollen upward to bend in a chevron shape. A resonator 45 disposed between a fuel tank 35 and the connecting tube 43 is connected to the connecting tube 43 on a side closer to an air cleaner 42 than an apex part 70a of the bend 70 in a vehicle side view.SELECTED DRAWING: Figure 3

Description

  The present invention has a fuel tank and an engine body disposed below the fuel tank mounted on the body frame, and includes an air cleaner, a connecting tube having an upstream end connected to the air cleaner, and a throttle valve. The present invention relates to a saddle-ride type vehicle in which an intake device including a throttle device connected to a downstream end of the connecting tube and a resonator is disposed at a position covered with the fuel tank from above.

  A motorcycle in which a resonator is connected to an intake pipe between a throttle body which is a throttle device and an engine body is known from Patent Document 1, and a motorcycle in which a resonator is connected to a connecting tube between a throttle body and an air cleaner is patented. It is known from document 2.

Japanese Patent No. 3685220 JP 2011-47294 A

  However, in the device disclosed in Patent Document 1, since the connection portion of the resonator to the intake pipe is in the vicinity of the intake port, a countermeasure against the disturbance of the mixing ratio due to the fuel gas staying in the resonator as the intake air blows back is provided. Further, it is necessary to further improve countermeasures for backfire, countermeasures for radiant heat from the engine body, noise countermeasures in the air cleaner upstream of the intake device, and the like. On the other hand, in the device disclosed in Patent Document 2, the above-described problem does not occur, but fuel, moisture, etc., condensed inside the resonator enter the throttle device when the vehicle is not used after the engine is stopped. There is a problem that it is easy to adhere to.

  The present invention has been made in view of such circumstances, and is a saddle riding type capable of preventing fuel, moisture, and the like condensed inside the resonator from entering the throttle device when the vehicle is not used after the engine is stopped. The object is to provide a vehicle.

  In order to achieve the above object, according to the present invention, a fuel tank and an engine main body disposed below the fuel tank are mounted on a vehicle body frame, and an air cleaner and a connecting tube having an upstream end connected to the air cleaner. A straddle-type vehicle in which an intake device including a throttle device having a throttle valve connected to the downstream end of the connecting tube and a resonator is disposed at a position covered from above by the fuel tank, The connecting tube is formed with a curved portion that bulges upward and curves in a mountain shape, and the resonator disposed between the fuel tank and the connecting tube is located on the side of the air cleaner from the top of the curved portion in a vehicle side view. The first feature is to be connected to the connecting tube.

  According to the present invention, in addition to the configuration of the first feature, a recess for accommodating a part of the resonator is formed in a rear portion of the bottom plate of the fuel tank, and an upstream end of the connecting tube is disposed at the rear of the fuel tank. A second feature is that the air cleaner is disposed in a cleaner case of the air cleaner so as to overlap the end in a plan view.

  According to the third aspect of the present invention, in addition to the configuration of the second feature, the rear portion of the resonator along the vehicle front-rear direction is arranged to overlap the front portion of the cleaner case along the vehicle front-rear direction in plan view. It is characterized by.

  According to the present invention, in addition to the configuration of the second or third feature, a fuel pump is attached to the bottom plate of the fuel tank so that a lower portion of the fuel pump protrudes downward from the bottom plate. A fourth feature is that the resonator is disposed behind the fuel pump in the longitudinal direction of the vehicle.

  According to the present invention, in addition to any of the configurations of the second to fourth features, the connection portion of the resonator to the connecting tube is disposed on either the left or right side from the top of the bending portion, and the cleaner case A fifth feature is that an air hose extending in the vehicle front-rear direction is routed so as to pass above the connecting tube on either the left or right side of the top of the curved portion.

  Furthermore, in addition to any of the configurations of the second to fifth features, the present invention further includes a riding seat that covers the air cleaner from above at the rear of the fuel tank along the vehicle front-rear direction, and the cleaner for the air cleaner A sixth feature is that the element is arranged to be spaced rearward in the vehicle longitudinal direction from the upstream end of the connecting tube while keeping the air flow direction along the vehicle longitudinal direction.

  According to the first aspect of the present invention, since the resonator is disposed between the fuel tank and the connecting tube, it is possible to secure the volume of the resonator while avoiding the rear portion of the fuel tank from being raised, and the connecting Since the resonator is connected to the connecting tube on the air cleaner side as seen from the side of the vehicle rather than the top of the angled curved part formed on the tube, the fuel and moisture condensed inside the resonator are connected when the vehicle is not in use after the engine is stopped. Even if it falls to the tube side, it flows to the air cleaner side and can be prevented from entering the throttle device.

  According to the second feature of the present invention, a part of the resonator is housed in a recess formed in the rear part of the bottom plate of the fuel tank, and the upstream end of the mountain-shaped connecting tube is in plan view on the rear end of the fuel tank. Since they are arranged in the cleaner case so as to overlap, the height of the rear part of the fuel tank can be further reduced.

  According to the third aspect of the present invention, the resonator is flattened so that the rear portion of the resonator overlaps the front portion of the cleaner case in a plan view, thereby suppressing an increase in the rear portion of the fuel tank. Volume can be secured.

  According to the fourth aspect of the present invention, the resonator is disposed behind the fuel pump attached to the bottom plate of the fuel tank in the front-rear direction of the vehicle so that the space around the lower part of the fuel pump is made effective. A resonator can be arranged by using it.

  According to the fifth feature of the present invention, the connecting portion of the resonator to the connecting tube is disposed at a position biased to either the left or right side from the top of the curved portion, so that the rear portion of the fuel tank is raised. The length of the passage between the resonator and the connecting tube can be secured while the air hose extending from the cleaner case in the vehicle longitudinal direction passes above the connecting tube on either the left or right side of the top of the curved portion. Smooth air hose routing is possible.

  Further, according to the sixth aspect of the present invention, the cleaner element of the air cleaner is arranged to be separated from the upstream end of the connecting tube at the rear in the vehicle longitudinal direction while keeping the air flow direction along the vehicle longitudinal direction. Therefore, the space between the connecting tube and the cleaner element can be secured, and the height of the air cleaner can be suppressed to contribute to the reduction of the seat height.

1 is a left side view of a motorcycle. It is a top view of the vehicle body frame except a rear frame. It is a principal part enlarged view of FIG. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a longitudinal cross-sectional view of an air cleaner.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the following description, the front and rear, the top and bottom, and the left and right directions are directions as viewed from the occupant riding the motorcycle.

  1 and 2, a body frame F of a motorcycle that is a saddle-ride type vehicle includes a head pipe 13 that supports a front fork 11 and a steering handle 12 that pivotally support a front wheel WF, and a head pipe 13 A pair of left and right main frames 14 connected to the upper portion of the pipe 13 and extending rearwardly downward, and a pair of left and right downframes connected to the lower portion of the head pipe 13 and extending rearwardly lower than the main frame 14 15 and a pair of left and right side pipes 16a, each of which has a front end portion connected to the lower portion of the pair of left and right main frames 14 and extends rearwardly upward. A seat frame 16 integrally connected by a C-shaped connecting pipe 16b and a pair of left and right main frames 14 in the middle of the vehicle body in the longitudinal direction. A pair of left and right seat sub-frames 17 having a front end portion continuously provided and inclined slowly rearwardly, and a rear end portion provided in a middle portion along the vehicle body longitudinal direction of the side pipe 16a in the seat frame 16; And a pair of left and right rear frames 18 connected to the seat frame 16 and extending rearward.

  Between the pair of left and right main frames 14, first, second, third, and fourth cross frames 19, 20, 21, and 22 are installed in order from the front side along the vehicle longitudinal direction. Reinforcing frames 23 and 24 are provided between the main frame 14 and the down frame 15 at two positions spaced apart from each other. A fifth cross frame 25 is provided between the pair of left and right side pipes 16a in the seat frame 16, and a reinforcing frame 26 is provided between the rear part of the seat subframe 17 and the rear part of the side pipe 16a. Is provided.

  3 and 4 together, the engine main body 27 of the single-cylinder engine E mounted on the vehicle body frame F is supported by the main frame 14 and the down frame 15 of the vehicle body frame F. A front end portion of a swing arm 32 that pivotally supports a rear wheel WR at a rear end portion is supported on a bracket 31 provided at a lower portion of the main frame 14 via a support shaft 33 so as to be swingable. A rear cushion unit 34 is provided between the swing arms 32. A fuel tank 35 disposed above the engine body 27 is supported by the main frame 14, and a passenger seat 36 disposed behind the fuel tank 35 so as to carry an occupant is supported by the seat frame 16. Is done. Further, a rear fender 38 is attached to the pair of left and right rear frames 18 so as to cover the rear wheel WR from above, and a passenger seat 37 disposed behind the passenger seat 36 so as to carry the passenger. Provided on the rear fender 38.

  An exhaust pipe 39 having an upstream end connected to the front side wall of the cylinder head 29 in the engine body 27 extends rearward through the lower side of the engine body 27 and is disposed on the right side of the rear wheel WR. Connected to the muffler 40.

  The intake device 41 connected to the rear side wall of the cylinder head 29 has an air cleaner 42, a connecting tube 43 connected to the air cleaner 42 at the upstream end, and a throttle valve 46 at the downstream end of the connecting tube 43. A throttle body 44 as a throttle device to be connected and a resonator 45 are included. The air cleaner 42 is disposed behind the engine body 27 in the vehicle longitudinal direction, and a fuel injection valve 47 is disposed on the throttle body 44 disposed in front of the air cleaner 42 and connected to the rear side wall of the cylinder head 29. It is attached.

  The intake device 41 is disposed at a position covered with the fuel tank 35 together with the engine body 27 from above. Further, behind the fuel tank 35 along the vehicle front-rear direction, the passenger seat 36 supported by the seat frame 16 so as to place an occupant is disposed so as to cover the air cleaner 42 from above.

  Referring to FIGS. 5 and 6 together, the cleaner case 48 of the air cleaner 42 includes first and second case halves 49 and 50 formed of synthetic resin and arranged in the vehicle width direction. The opposing edges of the halves 49, 50 are joined together by friction bonding. The cleaner case 48 includes a rectangular box-shaped cleaner case main portion 48a in which the cleaner element 55 is accommodated and arranged, and an extending portion extending forward from the front upper portion of the cleaner case main portion 48a along the vehicle front-rear direction. 48b.

  The joint portion 51 of the first and second case halves 49 and 50 is basically along the vehicle front-rear direction, and the rear portion of the joint portion 51 is substantially bent in an L shape in plan view. In this way, an enlarged portion 49 a that is enlarged toward the second case half 50 is provided in the first case half 49.

  Further, the cleaner element opened to the left side so that the cleaner element 55 can be removably inserted into the cleaner case main part 48a into the first case half 49 of the first and second case halves 49, 50. An insertion / removal port (not shown), a purified air outlet 53 to which the connecting tube 43 is connected, and an external air suction port 54 for introducing air from the outside into the cleaner case 48 are provided, and the cleaner A lid member 56 that closes the element insertion / removal opening is detachably attached to the left side surface of the first case half 49.

  An unpurified chamber 57 disposed on the upstream side of the cleaner element 55 is formed in the first case half 49 at a portion corresponding to the cleaner case main portion 48 a, and a part of the unpurified chamber 57 is formed. Is formed by the enlarged portion 49 a of the first case half 49.

  A recess 59 that opens rearward and upward in the vehicle front-rear direction is formed on the rear upper surface of the first case half 49 along the vehicle front-rear direction of the enlarged portion 49 a, and the external air inlet 54 is formed on the bottom surface of the recess 59. Is provided. A longitudinal intermediate portion of an intake duct 58 for sucking air from outside is connected to the external air inlet 54 so that one end of the intake duct 58 enters the unpurified chamber 57. The other end side of the intake duct 58 is extended rearward and upward from the bottom surface of the recess 59 in the recess 59 so as not to protrude upward from the cleaner case 48 in a side view. .

  The purified air outlet 53 is provided on the front end surface of the first case half 49 corresponding to the front end portion of the extending portion 48b along the vehicle front-rear direction. In the cleaner case 48, a purification chamber 60 is formed on the downstream side of the cleaner element 55, and an intermediate portion in the longitudinal direction of the connecting tube 43 is connected to one end of the connecting tube 43. It is connected to the purified air outlet 53 so as to enter the chamber 60.

  Referring to FIG. 6, the first case half 49 is integrally provided with an element support wall portion 49 b that supports the peripheral portion of the support frame 63 provided in the cleaner element 55. The element support wall 49 b is provided with a rectangular opening 61 disposed between the non-purification chamber 57 and the purification chamber 60. The cleaner element 55 that covers the opening 61 from the unpurified chamber 57 side is such that the flow direction 62 of the air passing through the cleaner element 55 is along the vehicle front-rear direction, and the vehicle is more upstream than the upstream end 43a of the connecting tube 43. It is supported by the element support wall portion 49b so as to be spaced apart rearward in the front-rear direction.

  The element support frame 63 is formed in a rectangular shape so that a part of the element support frame 63 is fitted into the opening 61, and the support cylinder portion 63 a in which the cleaner element 55 is accommodated and supported, and the element support wall frame 63 is not yet supported. It is formed so as to have a flange portion 63b projecting laterally from the support cylinder portion 63a so as to abut on the purification chamber 57 side via an endless seal member 64.

  The cleaner element 55 is provided with a plurality of flow holes (not shown), and is made of a metal plate that comes into contact with the end of the support cylinder portion 63a of the element support frame 63 on the purification chamber 60 side. 66 and a mesh member 67 that contacts the plate 66 from the purification chamber 60 side, and is covered from the purification chamber 60 side, and the plate 66 and the mesh member 67 are fixed to the support cylinder portion 63a. The

  A housing recess 65 that is recessed inward is formed on the outer surface of the lid member 56, and a vehicle accessory such as a fuse box 66 is housed and held in the housing recess 65. Further, the cleaner case 48 is disposed in front of the battery box 67 mounted on the vehicle body frame F in the vehicle front-rear direction, and the recess 59 provided at the rear portion of the cleaner case 48 is formed in the battery box 67 from the rear. Covered.

  The connecting tube 43 is formed to have a curved portion 70 that bulges upward and curves in a mountain shape in the middle in the longitudinal direction, and the resonator 45 disposed between the fuel tank 35 and the connecting tube 43. However, it is connected to the connecting tube 43 on the side of the air cleaner 42 in a side view of the vehicle with respect to the top portion 70a of the curved portion 70.

  The resonator 45 is formed so as to integrally have a chamber part 45a and a connecting pipe part 45b connected to the chamber part 45a. On the other hand, a connecting pipe 43b is integrally projected from the connecting tube 43 at a portion closer to the air cleaner 42 than the top 70a of the curved portion 70 in a side view of the vehicle. That is, in the connecting tube 43, the vehicle is viewed from the side of the vehicle more than the first plane PL <b> 1 passing through the top portion 70 a that is the uppermost highest portion of the inner surface of the bending portion 70 and the lower highest portion 70 b of the inner surface of the bending portion 70. The connecting pipe portion 43b is integrally protruded from the connecting tube 43 so as to open to the upper inner surface of the connecting tube 43 on the air cleaner 42 side. The resonator 45 is connected to the connecting tube 43 by tightening with the belt 71 in a state in which the connecting tube portion 45b of the resonator 45 is fitted to the connecting tube portion 43b.

  Moreover, the connecting portion of the resonator 45 to the connecting tube 43, that is, the connecting pipe portion 43 b provided integrally with the connecting tube 43 is either one of the left and right sides of the top portion 70 a of the bending portion 70 of the connecting tube 43 (this embodiment). The connecting pipe portion 43b is provided integrally with the connecting tube 43 so as to be inclined obliquely.

  Incidentally, an air hose 72 for guiding secondary air for exhaust purification to the engine body 27 extends from the cleaner case 48 in the air cleaner 42 so as to extend in the vehicle front-rear direction. The air hose 72 whose one end is connected to a secondary air outlet pipe 73 provided integrally with the front end wall of the second case half 50 that constitutes the cleaner case 48 together with the first case half 49 includes the curved portion 70. It is routed so as to pass above the connecting tube 43 on the left or right other side (right side in this embodiment) of the top part 70a, and a part of the chamber part 45a of the resonator 45 is part of the air hose 72. Is disposed at a position covering from above.

  A recess 75 for accommodating a part of the resonator 45 is formed in the rear portion of the bottom plate 74 of the fuel tank 35, and the upstream end 43 a of the connecting tube 43 is flat on the rear end 35 a of the fuel tank 35. It arrange | positions in the cleaner case 48 of the said air cleaner 42 so that it may overlap in view. That is, the second vertical plane PL2 extending in the vehicle width direction through the rear end 35a of the fuel tank 35 also passes through the upstream end 43a of the connecting tube 43 in the cleaner case 48.

  The rear portion of the resonator 45 along the vehicle front-rear direction, that is, the rear portion of the chamber portion 45a is disposed so as to overlap the front portion of the cleaner case 48 along the vehicle front-rear direction, and the chamber portion 45a. A third vertical plane PL3 extending in the vehicle width direction through the rear end passes through the front portion of the cleaner case 48.

  Further, a fuel pump 76 is attached to the bottom plate 74 of the fuel tank 35 such that a lower portion 76a of the fuel pump 76 projects downward from the bottom plate 74, and the vehicle of the lower portion 76a of the fuel pump 76 is viewed from the side of the vehicle. The resonator 45 is arranged behind in the front-rear direction.

  Next, the operation of this embodiment will be described. The connecting tube 43 is formed with a curved portion 70 that bulges upward and curves in a mountain shape, and a resonator 45 disposed between the fuel tank 35 and the connecting tube 43 is provided. Since the connecting portion 43 is connected to the connecting tube 43 on the air cleaner 42 side as viewed from the side of the vehicle with respect to the top portion 70a of the curved portion 70, the volume of the resonator 45 can be secured while avoiding the rear portion of the fuel tank 35 from becoming high. In the throttle body 44, fuel or moisture condensed inside the resonator 45 is allowed to flow to the air cleaner 42 side even if it falls to the connecting tube 43 side when the vehicle is not used after the engine E is stopped. Can be prevented from entering.

  A recess 75 for accommodating a part of the resonator 45 is formed at the rear part of the bottom plate 74 of the fuel tank 35 so that the upstream end of the connecting tube 43 overlaps the rear end 35a of the fuel tank 35 in plan view. Since the air cleaner 42 is disposed in the cleaner case 48, the height of the rear portion of the fuel tank 35 can be further reduced.

  Further, since the rear portion of the resonator 45 along the vehicle front-rear direction is disposed so as to overlap the front portion of the cleaner case 48 along the vehicle front-rear direction in plan view, the flattening of the resonator 45 allows the fuel tank 35 to be flattened. The volume of the resonator 45 can be ensured while suppressing an increase in the rear part.

  A fuel pump 76 is attached to the bottom plate 74 of the fuel tank 35 such that a lower portion 76a of the fuel pump 76 projects downward from the bottom plate 74, and the vehicle front and rear of the lower portion 76a of the fuel pump 76 in a vehicle side view. Since the resonator 45 is disposed rearward in the direction, the resonator 45 can be disposed by effectively utilizing the space around the lower portion 76a of the fuel pump 76.

  Further, since the connecting portion of the resonator 45 to the connecting tube 43 is arranged on either one of the left and right sides from the top portion 70a of the bending portion 70, the resonator 45 and the rear portion of the fuel tank 35 are prevented from being raised. The length of the passage between the connecting tubes 43 can be secured, and an air hose 72 extending from the cleaner case 48 in the vehicle front-rear direction is located above the connecting tube 43 on either the left or right side of the top portion 70a of the curved portion 70. Therefore, the air hose 72 can be smoothly routed.

  Further, a passenger seat 36 that covers the air cleaner 42 from above is disposed behind the fuel tank 35 along the vehicle longitudinal direction, and the cleaner element 55 of the air cleaner 42 causes the air flow direction 62 to follow the vehicle longitudinal direction. In this way, the seat is disposed rearward in the vehicle front-rear direction from the upstream end 43a of the connecting tube 43, so that the space between the connecting tube 43 and the cleaner element 55 is secured and the height of the air cleaner 42 is suppressed. This can contribute to a reduction in height.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the case where the throttle device is the throttle body 44 has been described, but the present invention can also be applied when the throttle device is a carburetor. The present invention can be widely applied not only to motorcycles but also to saddle-ride type vehicles including motor tricycles.

27 ... Engine body 35 ... Fuel tank 35a ... Rear end 36 of fuel tank ... Riding seat 41 ... Intake device 42 ... Air cleaner 43 ... Connecting tube 43a ... Connecting Upstream end 44 of the tube ... Throttle body 45 as a throttle device ... Resonator 46 ... Throttle valve 48 ... Cleaner case 55 ... Cleaner element 62 ... Air flow direction 70 ... Curved Portion 70a ... Curved portion top 72 ... Air hose 74 ... Bottom plate 75 ... Recess 76 ... Fuel pump 76a ... Lower part F of fuel pump ... Body frame

Claims (6)

  A fuel tank (35) and an engine body (27) disposed below the fuel tank (35) are mounted on the vehicle body frame (F), and an air cleaner (42) and an upstream end are connected to the air cleaner (42). A connecting tube (43) connected to the connecting tube (43), a throttle device (44) connected to the downstream end of the connecting tube (43), and a resonator (45). 41) In a saddle-ride type vehicle disposed at a position covered with the fuel tank (35) from above, the connecting tube (43) has a curved portion (70) that bulges upward and curves in a mountain shape. The resonator (45) formed and disposed between the fuel tank (35) and the connecting tube (43) is connected to the curved portion (70). Saddle type vehicle, characterized in that connected to the connecting tube with the air cleaner (42) side as viewed from the side of the vehicle (43) than the top portion (70a) of.   A recess (75) for accommodating a part of the resonator (45) is formed in a rear portion of the bottom plate (74) of the fuel tank (35), and an upstream end (43a) of the connecting tube (43) is connected to the fuel tank (35). The saddle-ride type vehicle according to claim 1, wherein the saddle-ride type vehicle is disposed in a cleaner case (48) of the air cleaner (42) so as to overlap the rear end (35a) of the tank (35) in a plan view.   The scissors according to claim 2, wherein a rear portion of the resonator (45) along the vehicle front-rear direction is disposed so as to overlap with a front portion of the cleaner case (48) along the vehicle front-rear direction in plan view. Ride type vehicle.   A fuel pump (76) is attached to the bottom plate (74) of the fuel tank (35) with the lower portion (76a) of the fuel pump (76) projecting downward from the bottom plate (74). The saddle-ride type vehicle according to claim 2 or 3, wherein the resonator (45) is arranged behind the lower part (76a) of the fuel pump (76) in the vehicle front-rear direction.   The connecting portion of the resonator (45) to the connecting tube (43) is arranged on either the left or right side from the top (70a) of the bending portion (70), and extends from the cleaner case (48) in the vehicle longitudinal direction. The extending air hose (72) is routed so as to pass above the connecting tube (43) on either the left or right side of the top (70a) of the curved portion (70). The saddle riding type vehicle according to any one of?   A passenger seat (36) for covering the air cleaner (42) from above is disposed behind the fuel tank (35) along the vehicle longitudinal direction, and the cleaner element (55) of the air cleaner (42) is arranged to distribute air. 6. The vehicle according to claim 2, wherein the direction (62) is arranged along the vehicle front-rear direction and is separated from the upstream end (43a) of the connecting tube (43) at the rear in the vehicle front-rear direction. The saddle-ride type vehicle according to any one of the above.

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